=pod =head1 NAME X509_PUBKEY_new, X509_PUBKEY_free, X509_PUBKEY_dup, X509_PUBKEY_set, X509_PUBKEY_get0, X509_PUBKEY_get, d2i_PUBKEY, i2d_PUBKEY, d2i_PUBKEY_bio, d2i_PUBKEY_fp, i2d_PUBKEY_fp, i2d_PUBKEY_bio, X509_PUBKEY_set0_param, X509_PUBKEY_get0_param - SubjectPublicKeyInfo public key functions =head1 SYNOPSIS #include X509_PUBKEY *X509_PUBKEY_new(void); void X509_PUBKEY_free(X509_PUBKEY *a); X509_PUBKEY *X509_PUBKEY_dup(const X509_PUBKEY *a); int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey); EVP_PKEY *X509_PUBKEY_get0(const X509_PUBKEY *key); EVP_PKEY *X509_PUBKEY_get(const X509_PUBKEY *key); EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length); int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp); EVP_PKEY *d2i_PUBKEY_bio(BIO *bp, EVP_PKEY **a); EVP_PKEY *d2i_PUBKEY_fp(FILE *fp, EVP_PKEY **a); int i2d_PUBKEY_fp(const FILE *fp, EVP_PKEY *pkey); int i2d_PUBKEY_bio(BIO *bp, const EVP_PKEY *pkey); int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype, void *pval, unsigned char *penc, int penclen); int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk, int *ppklen, X509_ALGOR **pa, const X509_PUBKEY *pub); =head1 DESCRIPTION The B structure represents the ASN.1 B structure defined in RFC5280 and used in certificates and certificate requests. X509_PUBKEY_new() allocates and initializes an B structure. X509_PUBKEY_free() frees up B structure B. If B is NULL nothing is done. X509_PUBKEY_set() sets the public key in B<*x> to the public key contained in the B structure B. If B<*x> is not NULL any existing public key structure will be freed. X509_PUBKEY_get0() returns the public key contained in B. The returned value is an internal pointer which B be freed after use. X509_PUBKEY_get() is similar to X509_PUBKEY_get0() except the reference count on the returned key is incremented so it B be freed using EVP_PKEY_free() after use. d2i_PUBKEY() and i2d_PUBKEY() decode and encode an B structure using B format. They otherwise follow the conventions of other ASN.1 functions such as d2i_X509(). d2i_PUBKEY_bio(), d2i_PUBKEY_fp(), i2d_PUBKEY_bio() and i2d_PUBKEY_fp() are similar to d2i_PUBKEY() and i2d_PUBKEY() except they decode or encode using a B or B pointer. X509_PUBKEY_set0_param() sets the public key parameters of B. The OID associated with the algorithm is set to B. The type of the algorithm parameters is set to B using the structure B. The encoding of the public key itself is set to the B bytes contained in buffer B. On success ownership of all the supplied parameters is passed to B so they must not be freed after the call. X509_PUBKEY_get0_param() retrieves the public key parameters from B, B<*ppkalg> is set to the associated OID and the encoding consists of B<*ppklen> bytes at B<*pk>, B<*pa> is set to the associated AlgorithmIdentifier for the public key. If the value of any of these parameters is not required it can be set to B. All of the retrieved pointers are internal and must not be freed after the call. =head1 NOTES The B functions can be used to encode and decode public keys in a standard format. In many cases applications will not call the B functions directly: they will instead call wrapper functions such as X509_get0_pubkey(). =head1 RETURN VALUES If the allocation fails, X509_PUBKEY_new() returns B and sets an error code that can be obtained by L. Otherwise it returns a pointer to the newly allocated structure. X509_PUBKEY_free() does not return a value. X509_PUBKEY_get0() and X509_PUBKEY_get() return a pointer to an B structure or B if an error occurs. X509_PUBKEY_set(), X509_PUBKEY_set0_param() and X509_PUBKEY_get0_param() return 1 for success and 0 if an error occurred. =head1 SEE ALSO L, L, L, =head1 COPYRIGHT Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut